PRECISION DESIGN OF PROTON EXCHANGE MEMBRANE FUEL CELL FLOW FIELD BASED ON WATER AND HEAT TRANSFER MECHANISM

The article establishes a three-dimensional multiphase proton exchange membrane single-cell model and investigates the impact of precision flow field design on the electrochemical characteristics, heat mass transfer properties, and phase change characteristics of fuel cells. The simulation model is analyzed using COMSOL 6.0 multiphysics software and validated using experimental data under the same operating conditions. The research results indicate that precision flow field design can enhance the electrochemical characteristics of proton exchange membrane fuel cells (PEMFC) by reducing concentration overpotentials through improved gas mass transfer, thus increasing the performance of cell. Precision flow field design improves gas and current density distribution uniformity, promoting more uniform electrochemical reactions and enhancing cell durability. Finally, precision flow field design increases gas mass transfer rates, effectively removing liquid water from the interior and facilitating smoother gas transport to the active regions. This study provides new insights into flow field design for fuel cells.